import {v4 as uuidv4} from 'uuid'

// 生成一个随机的字符串，且每次执行不能变化，游客身份持久存储
export const getUUID = ()=>{
    // 先从localstorage获取uuid
    let uuid_token = localStorage.getItem('UUIDTOKEN')
    // 判断有没有uuid
    if(!uuid_token){
        // 生成临时游客身份
        uuid_token = uuidv4()
        // 本地存储一次
        localStorage.setItem('UUIDTOKEN',uuid_token)
    }
    return uuid_token
}